Improvement in cutting-nippers



W. X. STEVENS.

Improvement in Nippers.

No. 126,423. PatentedMay7,18'72.1

U NITED- STATES PATENT OFFICE.

WILLIAM X. STEVENS, OF EAST BROOKFIELD, MASSACHUSETTS.

IMPROVEMENT IN CUTTING-NIPPERS.

Specification forming part of Letters Patent No. 126,423, dated May 7,1872.

Specification describing an Improvement in Out-Nippers, used for cuttingoff wire and for similar purposes, invented by WILLIAM X. STEVENS, ofEast Brookfield, in the county of Vorcester and State of Massachusetts.

My invention relates to the position, relative to each other, of thecutting-edges of nippers, and has for its object to produce a shearingcut.

Formerly the jaws of cut-nippers have been shaped alike, with theircutting-edges at equal distances from the axis 'of motion, so as to meetin a line of contact, acting as two chisels to wedge apart the piecebeing out.

By my invention the outer edge of one jaw passes or just meets the inneredge of the other jaw, like shears, one jaw being nearer the axis ofmotion than the other.

Figure 1 is a drawing showing my invention, of whicha is the inner jawand b the outer jaw of the nippers, and 0 their axis of motion. Thejoint and levers may be of any suitable form. To be perfect inprinciple, according to my invention, the outer face of jaw a and innerface of jaw b should be formed, respectively, as the outer and innerarcs of cylinders of the same radius, the chord of said arcs to be equalto the distance which the jaws overlap each other.

In practice, the nippers are made like the old-style nippers, with onejaw bent in enough to pass the other in close contact, as shown in thedrawing; and the contact may be the whole length of the edges at once,or the jaws may meet first at one end, then pass each other with aprogressive point of j uncture, like actual shears. To effect this theedges of the jaws may be parallel, or they may form an angle whose linesare in the cylindrical curve of their contact.

I claim as my invention Shearing-cut nippers, formed. as described andshown, for the purpose specified.

W. X. STEVENS.

Witnesses:

JOHN H. ll/IONEGAN, JOSIAH HOBBS.

